Distribution of Fluorescence Excitation of Bivalent Europium in Calcium Fluoride and of Bivalent Samarium in Calcium Sulphate

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Abstract

IN an earlier communication1, it was mentioned that prolonged treatment of rare earth preparations with short-wave ultra-violet radiations produces an effect similar to that obtained with radium rays.

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  1. 1

    NATURE, 142, 256 (1938).

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ECKSTEIN, H. Distribution of Fluorescence Excitation of Bivalent Europium in Calcium Fluoride and of Bivalent Samarium in Calcium Sulphate. Nature 143, 1067 (1939) doi:10.1038/1431067a0

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